Table of Contents
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TABLE OF CONTENTS
SECTION A:
Introduction ................................................................... page 2
Testing/ listing information ............................................ page 2
Part numbers ................................................................. page 3
Effective length .............................................................. page 3
Clearances to combustibles ........................................... page 3
General installation requirements ................................. page 4
Chimney weight ............................................................ page 4
Support methods and height ......................................... page 4
Guying and Bracing ........................................................ page 5
Horizontal installation requirements ............................. page 6
Vertical installation requirements ................................. page 7
Roof/floor penetration .................................................. page 7
Maintain proper slope ................................................... page 7
Wall penetration ........................................................... page 8
Condensate drains ......................................................... page 9
Typical installations (DS-DSD-DSID) ............................... page 10
Chimney and fitting joint assembly (DS-DSD-DSID) ....... page 12
Adustable length (DS-DSD-DSID) ................................... page 13
Telescopic adjustable length (DS-DSD-DSID) .................. page 13
DuraSeal as a liner ......................................................... page 14
DuraSeal® Flex .............................................................. page 14
Specific Information for Models DSLS and DSLD (26'' to 36'')
Typical Installation (DSLS-DSLD) .................................... page 19
Guying and Bracing (DSLS-DSLD) ................................... page 20
Joint Assembly (DSLS-DSLD) .......................................... page 21
Straight Sections (DSLS-DSLD) ....................................... page 21
Installation steps for Variable Length (LV) (DSLS-DSLD)........ page 22
CAPS (DSLS-DSLD) .......................................................... page 25
Elbows (DSLS-DSLD) ...................................................... page 25
Offset (DSLS-DSLD) ........................................................ page 25
Adapters (DSLS-DSLD) .................................................... page 26
Supports (DSLS-DSLD) ................................................... page 28
Ventilated Anchor Plate with Length (DSLS-DSLD) ......... page 28
Heavy Duty Wall Support (DSLS-DSLD) .......................... page 29
Heavy Duty Wall Guide (DSLS-DSLD) .............................. page 30
Full Angle Ring (DSLS-DSLD) .......................................... page 30
Half Angle Ring (DSLS-DSLD) ......................................... page 30
Location of supports (DSLS-DSLD) .................................. page 31
Flashings and Storm Collar (DSLS-DSLD) ........................ page 32
Maintenance instructions .............................................. page 33
2
SECTION A:
GENERAL INFORMATION FOR ALL MODELS
DS - DSD - DSID - DSLS - DSLD
INTRODUCTION
DuraSeal® single wall (DS 3"-24", DSLS 26"-36") or double wall
(DSD 3"-24", DSLD 26"-36") is a special stainless steel vent system
for gas fired appliances listed as Category I, II, III, and IV in USA UL
1738 or in Canada as Type BH Gas Venting as noted in ULC-S636,
with a maximum operating temperature of 480°F (250°C), and a
maximum rated positive pressure of 35" water column. It can also
vent listed gas or oil fired appliance rated to be vent with TYPE L
low temperature venting system (DSD & DSID only). DuraSeal®
must be installed by an experienced professional familiar with the
operation and maintenance of heating appliances and venting.
Before installing this product, examine all components for possible
shipping damage and read the complete installation manual.
Failure to follow proper installation procedures, including vent
pitch and improper appliance connections, may cause unsafe con-
ditions. DuraVent Limited recommends the system to be inspected
once a year by a qualified service technician.
Model DuraSeal may be installed outside the building envelope
where required providing the installation meets local code
requirements. In colder climates it is recommended to use model
DSID which has a 2'' fiber insulation between the annular space.
The insulation ensures reduced velocity noise and can protect the
flue gas from freezing up to -20°C (-4°F). Do not install a drain
fitting on exterior / make sure the DSID is brought into the interior
building envelope by at least 2-feet.
TESTING/LISTING INFORMATION
DuraVent Ltd. DuraSeal® model DS, DSD, DSID, DSLS and DSLD
venting system is listed with Intertek Testing Services (ETL) to UL/
ULC standards:
U.S.A.
• UL-1738
Special Gas Category I, II, III
and IV appliances
• UL-641 (DSD & DSID only)
TYPE L VENT venting listed gas
or oil burning appliances
This product must be installed in accordance with local building
code requirements as well as national codes: USA - National Fuel
Gas code ANSI-Z223.1 or NFPA Standard 54, or NFPA 211. CANADA
- CAN/CSA B-149.1 Natural Gas and Propane Installation code as
applicable.
CANADA
• ULC-S636
Type BH Gas Vent Class I/II
• ULC-S609 (DSD & DSID only)
TYPE L VENT venting of flue gases
with temperature not exceeding
300°C from oil and gas burning
appliances
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